A Parallel General-Purpose Adaptive Optimisation Engine R package ROptimus version 3.0.0 A general-purpose optimisation engine that supports i) Monte Carlo optimisation with Metropolis criterion [Metropolis et al. (1953) <doi:10.1063/1.1699114>, Hastings (1970) <doi:10.1093/biomet/57.1.97>] and Acceptance Ratio Simulated Annealing [Kirkpatrick et al. (1983) <doi:10.1126/science.220.4598.671>, Černý (1985) <doi:10.1007/BF00940812>] on multiple cores, and ii) Acceptance Ratio Replica Exchange Monte Carlo Optimisation. In each case, the system pseudo-temperature is dynamically adjusted such that the observed acceptance ratio is kept near to the desired (fixed or changing) acceptance ratio. Software Depends: R (>= 3.1.0) Imports: doParallel (>= 1.0.11), foreach (>= 1.4.4), iterators (>= 1.0.9), parallel (>= 3.4.2) Aleksandr B. Sahakyan <sahakyanlab@cantab.net> Comprehensive R Archive Network (CRAN) Nicholas Andre G. Johnson [aut], Liezel Tamon [aut], Xin Liu [aut], Aleksandr B. Sahakyan [aut, cre] GPL (>= 3) 2023-01-10 application/tgz https://CRAN.R-project.org/package=ROptimus doi:10.32614/CRAN.package.ROptimus